Transmission swap question

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Apr 20, 2004 | 08:40 PM

lambiz

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Transmission swap question

I have an '89 E-350 , 7.3 with a c-6 behind. rpm's are just too high for long trips. What tranny would be a good swap? If there is any, are there any major problems in swapping it out to a 4 speed, etc..?

Apr 20, 2004 | 09:14 PM

Spectramac

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The only things to do would be to add a Gearvender overdrive to the C-6 or put a higher gear in the rear end. To much work to put an E4OD in, and they are junk trannies anyway.

Apr 21, 2004 | 11:40 AM

redneckmechnic

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or convert the van to stick shift wich would be an anful lot of work and take some real ingneuity. but would be pretty darn cool. ya would have to use an over drive tranny like a zf out of a pickup truck.

Apr 21, 2004 | 12:25 PM

lambiz

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My problem is that its a church mini-bus. Multiple drivers, so-on etc..
out of the 3 that drive, i'm the only one that can drive a stick. Just trying to find a solution that will remain auto but knock the rpms down. One thing I didn't post yesterday was that the axle is a 4:10 ratio. Thanks for your replies.

Apr 21, 2004 | 01:13 PM

redneckmechnic

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well ya could defintly lower that rear axle ratio down and gain some. counting ya dont tow anything with the van or haul very much weight in it. iam amsuming ya just haul people.

Apr 21, 2004 | 01:16 PM

lambiz

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Just people, 21 to be exact if full.

May 17, 2004 | 11:29 AM

Raceallday

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Quote:

Originally Posted by Spectramac

The only things to do would be to add a Gearvender overdrive to the C-6 or put a higher gear in the rear end. To much work to put an E4OD in, and they are junk trannies anyway.

What is a Gearvender overdrive? How does it attach to the transmission and how much do they cost? Would the driveshaft need to be modified? I'm looking to improve the mileage on my 1988 F250. I thought about finding a 5-speed truck exactly like mine and swapping everything over, but thats a lot of work. If I could get an overdrive for the c6, that would be an easy way out.